Design Information Verification (DIV) is becoming increasingly important in International Safeguards as a way to verify that the plant set-up is consistent with the declared intent of its activities. This is particularly true for the complex environments of new nuclear installations. The International Atomic Energy Agency (IAEA) is using 3D Laser based systems (3DLR) developed by the Joint Research Centre since 2003 in different configurations as a reliable, accurate and efficient tool for the characterisation and verification of nuclear sites. The 3DLR is used in single mode to document design features or can be coupled with other optical systems to provide detailed mapping of facility sites. 3DLR has been successfully interfaced with commercial off the shelves radiation detectors (Rasdcan) to map radiation profiles and to detect radiation sources inside buildings. Indeed, due to the complexity of the applications, further integration development are foreseen to integrate these new features and offer enhanced capabilities of creating accurate representations of an environment in a reliable and expedite way. Within the framework of the European Commission Support Programme (EC-SP), the IAEA and the JRC have worked together for the definition of requirements, user interface, security features and, last but not least, the necessary training effort. The paper will present the experience on the utilisation of various 3DLR systems, the joint training effort and the further evolution of the systems for use by the IAEA.